1. Alexandria University, High Institute of Public Health, Bab Sharqi, Egypt
2. Alexandria University, Faculty of Medicine, Al Attarin, Egypt
3. Alfaisal University, College of Medicine, Riyadh, Saudi Arabia
4. Cairo University, Kasr Al-Ainy, Faculty of Medicine, Old Cairo, Egypt
5. Neuro-endovascular Surgery Department, Medical University of South Carolina (MUSC), South Carolina
6. Maharishi Markandeshwar Medical College, Mullana, Haryana, India
7. Beni Suef University, Faculty of Medicine, Beni Suef, Egypt
8. Nathiba Hargovandas Lakhmichand (NHL) Municipal Medical College, Ahmedabad, Gujarat, India
9. Shadan Institute of Medical Sciences, Peeramcheru, Hyderabad, India
10. Kateb University, Medical Research Center, Kabul, Afghanistan
11. SUNY Upstate Medical University, Medicine, Cardiovascular Perfusion, and Surgery Departments, NY
12. Suez Canal University, Family Medicine Department, El Sheikh Zayed, Egypt.